达林顿管电路原理分析

谁电路知识好的,帮我分析下 输入输出的关系
2025-04-07 22:31:34
推荐回答(3个)
回答1:

  首先此复合管同为NPN型,故β=β1*β2;T1管决定了,此复合管为NPN管。
  其次,2.7k电阻主要限流保护管子,并设置静态偏置电压;7.2k、3k提供漏电流泄放回路。com是公共电源端。
  达林顿管多用在大功率输出电路中,由于功率增大,管子本身压降会造成温度上升,再加上前级三极管的漏电流(Iceo) 也会被逐级放大,从而导致达林顿管整体热稳定性差。为了改变这种状况,在大功率达林顿管内部均设有均衡电阻7.2k和3k,这样不但可以大大提高管子的热稳定性,还能有效地提高末级功率三极管的耐压。在末级三极管的集电极与发射极之间反向并联一只阻尼二极管,以防负载突然断电时三极管被击穿,因大多负载比如电动机是感性的,断电后电流不会马上消失。下面的二极管起到加速的作用,引入电流串联正反馈,
  1管基极漏电流较小,故R1可适当大些。1管电流经过放大后加到2管,另有2管本身的漏电流,故2管基极电流较大,故应降低R2大小。

回答2:

有大虾能解释的了吗??

 

 

 

 

 

 

 

 

 

 

这才是正确的电路!网上有很多资料是错误的!看看这个:http://zhidao.baidu.com/question/516970670.html?from=pubpage&msgtype=2

 

回答3:

COM其实你都不需要太去理会
说到底就是INPUTB输入高电平OUTPUTC输出低电平

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